| Form type | Document | Filing | Description | Filing date | Reporting date | File number(s) | 
|---|---|---|---|---|---|---|
| 4 | Open Document | Open Filing | FORM 4 | Jan 4, 2022 | Jan 1, 2022 | 001-37391 | 
| 4 | Open Document | Open Filing | FORM 4 | Dec 15, 2021 | Dec 14, 2021 | 001-37391 | 
| 4 | Open Document | Open Filing | FORM 4 | Jul 21, 2021 | Jul 21, 2021 | 001-37391 | 
| 4 | Open Document | Open Filing | FORM 4 | Apr 21, 2021 | Apr 20, 2021 | 001-37391 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 24, 2020 | Jul 23, 2020 | 001-37391 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 22, 2020 | Jul 21, 2020 | 001-37391 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 25, 2019 | Jul 23, 2019 | 001-37391 | 
| 4 | Open Document | Open Filing | PRIMARY DOCUMENT | Jul 25, 2018 | Jul 24, 2018 | 001-37391 | 
| 3 | Open Document | Open Filing | PRIMARY DOCUMENT | Jan 8, 2018 | Jan 1, 2018 | 001-37391 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 3, 2018 | Jan 1, 2018 | 000-49966 | 
| SC 13D/A | Open Document | Open Filing | SC 13D/A | Apr 4, 2017 | ||
| SC 13D | Open Document | Open Filing | SC 13D | Jul 11, 2016 | ||
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jul 5, 2016 | Jun 30, 2016 | 000-49966 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Mar 11, 2016 | Nov 17, 2015 | 000-49966 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 16, 2015 | Apr 15, 2015 | 000-49966 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Jan 27, 2015 | Jan 23, 2015 | 000-49966 | 
| 4 | Open Document | Open Filing | FORM 4 SUBMISSION | Apr 29, 2014 | Apr 14, 2014 | 000-49966 |